Compilare: main.cpp: In function 'int main()': main.cpp:38:21: warning: format '%d' expects argument of type 'int', but argument 3 has type 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wformat=] 38 | fprintf(fout, "%d\n", contor.size()); | ~^ ~~~~~~~~~~~~~ | | | | int std::vector<int>::size_type {aka long unsigned int} | %ld